It there a way you can share the data with me? It will be very difficult to discover why there is an error without access to the data. You could also try and use a File Geodatabase (that would be the first thing I would do).

If you upload the files (<50MB) at this thread other users can chime in and help you too. If the link to dropbox is available for everyone and the files are bigger than 50MB Dropbox is good alternative.

I must say that I'm a bit busy these days with delivering some products before the end of this year, but if I find a moment I will certainly give it a shot.

This error seems to be related to the previous one. Please check that the rasters are integer. If they are not, they will not have a VAT which is required in the process. Did you pre-process the rasters the same way as you did with the first one?

As far as I understand from the error message there is no Value Attribute Table (VAT) for the raster "c:\PROGRA~2\arcgis\DESKTO~1.5\bin\pol83" and for some reason this file in not readable. Without the data it will be difficult to trace what is going wrong.

When you want to combine the percentile values for multiple rasters into the same polygon featureclass, the process should be changed drastically, since each raster should yield its own percentile fields each with its own name. At this point it is easier to run the code for each raster, but change the output fields before the next run. This can be done altering the variable fld_prefix for each run.